Brit HaBirionim was a self-declared faction of the Revisionist Zionist Movement in Mandatory Palestine, active between 1930 and 1933. It was founded by Abba Ahimeir, Uri Zvi Greenberg and Yehoshua Yeivin. Wikipedia
Founders: Abba Ahimeir, Uri Zvi Grinberg, and Yehoshua Yeivin